I'm sorry to hear your mother is ill in hospital?应该怎样回答?A.Nothing serious B.Thank you C.Don't worry D.That's all right

I'm sorry to hear your mother is ill in hospital?应该怎样回答?A.Nothing serious B.Thank you C.Don't worry D.That's all right
I'm sorry to hear your mother is ill in hospital?
应该怎样回答?A.Nothing serious B.Thank you C.Don't worry D.That's all right

I'm sorry to hear your mother is ill in hospital?应该怎样回答?A.Nothing serious B.Thank you C.Don't worry D.That's all right
C.Don't worry 别担心